A Wigan spokesman confirmed: "There is going to be no resolution today as we are still talking to Swansea."

Earlier chief executive Brenda Spencer appeared alone at a press conference to reveal the formalities over the Spaniard's deal could not be completed until a agreement was reached over his support team.

Spencer said they had been unable to contact Swansea chairman Huw Jenkins since Wednesday night - when she held further talks with Martinez - but were still hopeful of concluding the deal.

"We have an agreement with Roberto verbally but he cannot sign at the moment to be our manager until Swansea sign the agreement between the two clubs," said Spencer.

"It's absolutely frustrating because at no time over the last week have Swansea ever mentioned anything about backroom staff."